Kinetic Study on Alloying Element Transfer During an Electroslag Remelting Process

Hou, Dong; Wang, Deyong; Qu, Tianpeng; Tian, Juan; Wang, Huihua

doi:10.1007/s11663-019-01690-1

Cited by 9 publications

(1 citation statement)

References 25 publications

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“…Duan [ 6 , 7 ] studied the effect of each slag component on the activities of Al 2 O 2 and TiO 2 , and determined an appropriate slag to be used for ESR of superalloys based on experiments and thermodynamics. Jiang [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ] investigated the thermodynamic equilibrium of 3[Ti] + 2(Al 2 O 3 ) = 4[Al] + 3(TiO 2 ) and the effect of slag components on activities of Al 2 O 2 and TiO 2 in CaF 2 -CaO-MgO-Al 2 O 3 -TiO 2 slag system, and then TiO 2 in slag was calculated to control the titanium and aluminum contents in ESR ingot. However, the above researches [ 17 , 18 , 19 , 20 , 21 ] did not comprehensively consider the physical properties and thermodynamic equilibrium of 3[Ti] + 2(Al 2 O 3 ) = 4[Al] + 3(TiO 2 ).…”

Section: Introductionmentioning

confidence: 99%

Study on the Melting Temperature of CaF2-CaO-MgO-Al2O3-TiO2 Slag under the Condition of a Fixed Ratio of Titanium and Aluminum in the Steel during the Electroslag Remelting Process

et al. 2021

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During the process of electroslag remelting (ESR) of steel containing titanium and aluminum, the activity ratio between titania and alumina in CaF2-CaO-MgO-Al2O3-TiO2 slag must be fixed in order to guarantee the titanium and aluminum contents in the ESR ingots. Under the condition of fixed activity ratio between titania and alumina in the slag, the melting temperature of slag should be investigated to improve the surface quality of ESR ingots. Therefore, this paper focuses on finding a kind of slag with low melting temperature that can be used for producing steel containing titanium. In the current study, the thermodynamic equilibrium of 3[Ti] + 2(Al2O3) = 4[Al] + 3(TiO2) between SUS321 steel and the two slag systems (CaF2:MgO:CaO:Al2O3:TiO2 = 46:4:25:(25 − x):x and CaF2:MgO:CaO:Al2O3:TiO2 = 46:4:(25 − 0.5 x):(25 − 0.5 x):x) are studied in an electrical resistance furnace based on Factsage software. After obtaining the equilibrium slag with fixed activity ratio between titania and alumina, the melting temperatures of the two slag systems are studied using slag melting experimental measurements and phase diagrams. The results show that the slag systems CaF2:MgO:CaO:Al2O3:TiO2 = 46:4:25:(25 − x):x, which consists of pre-melted slag S0 (CaF2:MgO:CaO:Al2O3 = 46:4:25:25) and pre-melted slag F1 (CaF2:MgO:CaO:TiO2 = 46:4:25:25), can not only control the aluminum and titanium contents in steel, but also have the desired low melting temperature property.

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Section: Introductionmentioning

confidence: 99%

Study on the Melting Temperature of CaF2-CaO-MgO-Al2O3-TiO2 Slag under the Condition of a Fixed Ratio of Titanium and Aluminum in the Steel during the Electroslag Remelting Process

et al. 2021

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Control of Steel Composition and Evolution of Inclusions During Electroslag Remelting of NiCrMoV High‐Strength Steel

Ling,

Xu,

Chang

et al. 2024

steel research int.

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Herein, the control of steel composition and evolution of inclusions during the electroslag remelting (ESR) of NiCrMoV high‐strength steel are investigated by laboratory experiments and thermodynamic calculations. The effects of slag systems, atmosphere protection, and surface quality of the consumable electrode are discussed. Results show that slag containing 5% TiO2 and 2% SiO2 is beneficial for controlling Ti and Si losses in steel during the ESR. Using argon gas protection reduces the total oxygen (TO) and nitrogen contents in ESR ingots and improves steel cleanliness, while it has little influence on the types of inclusions. The oxide scales on the electrode surface lead to the reoxidation of liquid steel during the ESR. The TO content increases to 113 ppm and Si, Ti, Als, and Mn contents in ESR ingots are considerably reduced. The inclusions are transformed from Al2O3–CaO–TiOx–MgO to MnO–SiO2–Al2O3–TiOx. Thermodynamic calculations reveal that the decrease in temperature promotes the precipitation of Ca2Ti2O5 and Ca2Ti2O6 in inclusions. As the oxygen content from reoxidation increases, the formation of SiO2 and MnO in inclusions in ESR ingots is promoted. Appropriate process parameters are proposed to control the composition and cleanliness of steel during the ESR.

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Transient Simulations and Experiments on Compound Roll Produced by Electroslag Remelting Cladding

Hou

Dong

Yao

et al. 2021

Metall Mater Trans B

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Kinetic Study on Alloying Element Transfer During an Electroslag Remelting Process

Cited by 9 publications

References 25 publications

Study on the Melting Temperature of CaF2-CaO-MgO-Al2O3-TiO2 Slag under the Condition of a Fixed Ratio of Titanium and Aluminum in the Steel during the Electroslag Remelting Process

Study on the Melting Temperature of CaF2-CaO-MgO-Al2O3-TiO2 Slag under the Condition of a Fixed Ratio of Titanium and Aluminum in the Steel during the Electroslag Remelting Process

Control of Steel Composition and Evolution of Inclusions During Electroslag Remelting of NiCrMoV High‐Strength Steel

Transient Simulations and Experiments on Compound Roll Produced by Electroslag Remelting Cladding

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